2 * Error resilience / concealment
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * Error resilience / concealment.
30 #include "libavutil/internal.h"
32 #include "error_resilience.h"
33 #include "mpegvideo.h"
34 #include "rectangle.h"
39 * @param stride the number of MVs to get to the next row
40 * @param mv_step the number of MVs per row or column in a macroblock
42 static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
44 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
45 av_assert0(s->quarter_sample);
47 *stride = s->mb_width * 4;
50 *stride = s->b8_stride;
55 * Replace the current MB with a flat dc-only version.
57 static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb,
58 uint8_t *dest_cr, int mb_x, int mb_y)
60 int *linesize = s->cur_pic->f.linesize;
61 int dc, dcu, dcv, y, i;
62 for (i = 0; i < 4; i++) {
63 dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
68 for (y = 0; y < 8; y++) {
70 for (x = 0; x < 8; x++)
71 dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
74 dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
75 dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
84 for (y = 0; y < 8; y++) {
86 for (x = 0; x < 8; x++) {
87 dest_cb[x + y * linesize[1]] = dcu / 8;
88 dest_cr[x + y * linesize[2]] = dcv / 8;
93 static void filter181(int16_t *data, int width, int height, int stride)
97 /* horizontal filter */
98 for (y = 1; y < height - 1; y++) {
99 int prev_dc = data[0 + y * stride];
101 for (x = 1; x < width - 1; x++) {
104 data[x + y * stride] * 8 -
105 data[x + 1 + y * stride];
106 dc = (dc * 10923 + 32768) >> 16;
107 prev_dc = data[x + y * stride];
108 data[x + y * stride] = dc;
112 /* vertical filter */
113 for (x = 1; x < width - 1; x++) {
114 int prev_dc = data[x];
116 for (y = 1; y < height - 1; y++) {
120 data[x + y * stride] * 8 -
121 data[x + (y + 1) * stride];
122 dc = (dc * 10923 + 32768) >> 16;
123 prev_dc = data[x + y * stride];
124 data[x + y * stride] = dc;
130 * guess the dc of blocks which do not have an undamaged dc
131 * @param w width in 8 pixel blocks
132 * @param h height in 8 pixel blocks
134 static void guess_dc(ERContext *s, int16_t *dc, int w,
135 int h, int stride, int is_luma)
138 int16_t (*col )[4] = av_malloc(stride*h*sizeof( int16_t)*4);
139 uint32_t (*dist)[4] = av_malloc(stride*h*sizeof(uint32_t)*4);
142 av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
146 for(b_y=0; b_y<h; b_y++){
149 for(b_x=0; b_x<w; b_x++){
150 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
151 int error_j= s->error_status_table[mb_index_j];
152 int intra_j = IS_INTRA(s->cur_pic->mb_type[mb_index_j]);
153 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
154 color= dc[b_x + b_y*stride];
157 col [b_x + b_y*stride][1]= color;
158 dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
162 for(b_x=w-1; b_x>=0; b_x--){
163 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
164 int error_j= s->error_status_table[mb_index_j];
165 int intra_j = IS_INTRA(s->cur_pic->mb_type[mb_index_j]);
166 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
167 color= dc[b_x + b_y*stride];
170 col [b_x + b_y*stride][0]= color;
171 dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
174 for(b_x=0; b_x<w; b_x++){
177 for(b_y=0; b_y<h; b_y++){
178 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
179 int error_j= s->error_status_table[mb_index_j];
180 int intra_j = IS_INTRA(s->cur_pic->mb_type[mb_index_j]);
181 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
182 color= dc[b_x + b_y*stride];
185 col [b_x + b_y*stride][3]= color;
186 dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
190 for(b_y=h-1; b_y>=0; b_y--){
191 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
192 int error_j= s->error_status_table[mb_index_j];
193 int intra_j = IS_INTRA(s->cur_pic->mb_type[mb_index_j]);
194 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
195 color= dc[b_x + b_y*stride];
198 col [b_x + b_y*stride][2]= color;
199 dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
203 for (b_y = 0; b_y < h; b_y++) {
204 for (b_x = 0; b_x < w; b_x++) {
205 int mb_index, error, j;
206 int64_t guess, weight_sum;
207 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
208 error = s->error_status_table[mb_index];
210 if (IS_INTER(s->cur_pic->mb_type[mb_index]))
212 if (!(error & ER_DC_ERROR))
217 for (j = 0; j < 4; j++) {
218 int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
219 guess += weight*(int64_t)col[b_x + b_y*stride][j];
220 weight_sum += weight;
222 guess = (guess + weight_sum / 2) / weight_sum;
223 dc[b_x + b_y * stride] = guess;
233 * simple horizontal deblocking filter used for error resilience
234 * @param w width in 8 pixel blocks
235 * @param h height in 8 pixel blocks
237 static void h_block_filter(ERContext *s, uint8_t *dst, int w,
238 int h, int stride, int is_luma)
240 int b_x, b_y, mvx_stride, mvy_stride;
241 const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
242 set_mv_strides(s, &mvx_stride, &mvy_stride);
243 mvx_stride >>= is_luma;
244 mvy_stride *= mvx_stride;
246 for (b_y = 0; b_y < h; b_y++) {
247 for (b_x = 0; b_x < w - 1; b_x++) {
249 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
250 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
251 int left_intra = IS_INTRA(s->cur_pic->mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
252 int right_intra = IS_INTRA(s->cur_pic->mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
253 int left_damage = left_status & ER_MB_ERROR;
254 int right_damage = right_status & ER_MB_ERROR;
255 int offset = b_x * 8 + b_y * stride * 8;
256 int16_t *left_mv = s->cur_pic->motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
257 int16_t *right_mv = s->cur_pic->motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
258 if (!(left_damage || right_damage))
259 continue; // both undamaged
260 if ((!left_intra) && (!right_intra) &&
261 FFABS(left_mv[0] - right_mv[0]) +
262 FFABS(left_mv[1] + right_mv[1]) < 2)
265 for (y = 0; y < 8; y++) {
268 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
269 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
270 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
272 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
280 if (!(left_damage && right_damage))
284 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
285 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
286 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
287 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
290 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
291 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
292 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
293 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
301 * simple vertical deblocking filter used for error resilience
302 * @param w width in 8 pixel blocks
303 * @param h height in 8 pixel blocks
305 static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
306 int stride, int is_luma)
308 int b_x, b_y, mvx_stride, mvy_stride;
309 const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
310 set_mv_strides(s, &mvx_stride, &mvy_stride);
311 mvx_stride >>= is_luma;
312 mvy_stride *= mvx_stride;
314 for (b_y = 0; b_y < h - 1; b_y++) {
315 for (b_x = 0; b_x < w; b_x++) {
317 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
318 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
319 int top_intra = IS_INTRA(s->cur_pic->mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
320 int bottom_intra = IS_INTRA(s->cur_pic->mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
321 int top_damage = top_status & ER_MB_ERROR;
322 int bottom_damage = bottom_status & ER_MB_ERROR;
323 int offset = b_x * 8 + b_y * stride * 8;
325 int16_t *top_mv = s->cur_pic->motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
326 int16_t *bottom_mv = s->cur_pic->motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
328 if (!(top_damage || bottom_damage))
329 continue; // both undamaged
331 if ((!top_intra) && (!bottom_intra) &&
332 FFABS(top_mv[0] - bottom_mv[0]) +
333 FFABS(top_mv[1] + bottom_mv[1]) < 2)
336 for (x = 0; x < 8; x++) {
339 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
340 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
341 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
343 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
351 if (!(top_damage && bottom_damage))
355 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
356 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
357 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
358 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
361 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
362 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
363 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
364 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
371 static void guess_mv(ERContext *s)
373 uint8_t *fixed = s->er_temp_buffer;
376 #define MV_UNCHANGED 1
377 const int mb_stride = s->mb_stride;
378 const int mb_width = s->mb_width;
379 const int mb_height = s->mb_height;
380 int i, depth, num_avail;
381 int mb_x, mb_y, mot_step, mot_stride;
383 set_mv_strides(s, &mot_step, &mot_stride);
386 for (i = 0; i < s->mb_num; i++) {
387 const int mb_xy = s->mb_index2xy[i];
389 int error = s->error_status_table[mb_xy];
391 if (IS_INTRA(s->cur_pic->mb_type[mb_xy]))
392 f = MV_FROZEN; // intra // FIXME check
393 if (!(error & ER_MV_ERROR))
394 f = MV_FROZEN; // inter with undamaged MV
399 else if(s->last_pic->f.data[0] && s->last_pic->motion_val[0]){
400 const int mb_y= mb_xy / s->mb_stride;
401 const int mb_x= mb_xy % s->mb_stride;
402 const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
403 s->cur_pic->motion_val[0][mot_index][0]= s->last_pic->motion_val[0][mot_index][0];
404 s->cur_pic->motion_val[0][mot_index][1]= s->last_pic->motion_val[0][mot_index][1];
405 s->cur_pic->ref_index[0][4*mb_xy] = s->last_pic->ref_index[0][4*mb_xy];
409 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
410 num_avail <= mb_width / 2) {
411 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
412 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
413 const int mb_xy = mb_x + mb_y * s->mb_stride;
414 int mv_dir = (s->last_pic && s->last_pic->f.data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
416 if (IS_INTRA(s->cur_pic->mb_type[mb_xy]))
418 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
423 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
430 for (depth = 0; ; depth++) {
431 int changed, pass, none_left;
435 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
440 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
441 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
442 const int mb_xy = mb_x + mb_y * s->mb_stride;
443 int mv_predictor[8][2] = { { 0 } };
447 int best_score = 256 * 256 * 256 * 64;
449 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
450 int prev_x, prev_y, prev_ref;
452 if ((mb_x ^ mb_y ^ pass) & 1)
455 if (fixed[mb_xy] == MV_FROZEN)
457 av_assert1(!IS_INTRA(s->cur_pic->mb_type[mb_xy]));
458 av_assert1(s->last_pic && s->last_pic->f.data[0]);
461 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
463 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
465 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
467 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
473 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
475 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
477 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
479 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
481 if (j == 0 && pass > 1)
486 if (mb_x > 0 && fixed[mb_xy - 1]) {
487 mv_predictor[pred_count][0] =
488 s->cur_pic->motion_val[0][mot_index - mot_step][0];
489 mv_predictor[pred_count][1] =
490 s->cur_pic->motion_val[0][mot_index - mot_step][1];
492 s->cur_pic->ref_index[0][4 * (mb_xy - 1)];
495 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
496 mv_predictor[pred_count][0] =
497 s->cur_pic->motion_val[0][mot_index + mot_step][0];
498 mv_predictor[pred_count][1] =
499 s->cur_pic->motion_val[0][mot_index + mot_step][1];
501 s->cur_pic->ref_index[0][4 * (mb_xy + 1)];
504 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
505 mv_predictor[pred_count][0] =
506 s->cur_pic->motion_val[0][mot_index - mot_stride * mot_step][0];
507 mv_predictor[pred_count][1] =
508 s->cur_pic->motion_val[0][mot_index - mot_stride * mot_step][1];
510 s->cur_pic->ref_index[0][4 * (mb_xy - s->mb_stride)];
513 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
514 mv_predictor[pred_count][0] =
515 s->cur_pic->motion_val[0][mot_index + mot_stride * mot_step][0];
516 mv_predictor[pred_count][1] =
517 s->cur_pic->motion_val[0][mot_index + mot_stride * mot_step][1];
519 s->cur_pic->ref_index[0][4 * (mb_xy + s->mb_stride)];
525 if (pred_count > 1) {
526 int sum_x = 0, sum_y = 0, sum_r = 0;
527 int max_x, max_y, min_x, min_y, max_r, min_r;
529 for (j = 0; j < pred_count; j++) {
530 sum_x += mv_predictor[j][0];
531 sum_y += mv_predictor[j][1];
533 if (j && ref[j] != ref[j - 1])
534 goto skip_mean_and_median;
538 mv_predictor[pred_count][0] = sum_x / j;
539 mv_predictor[pred_count][1] = sum_y / j;
540 ref[pred_count] = sum_r / j;
543 if (pred_count >= 3) {
544 min_y = min_x = min_r = 99999;
545 max_y = max_x = max_r = -99999;
547 min_x = min_y = max_x = max_y = min_r = max_r = 0;
549 for (j = 0; j < pred_count; j++) {
550 max_x = FFMAX(max_x, mv_predictor[j][0]);
551 max_y = FFMAX(max_y, mv_predictor[j][1]);
552 max_r = FFMAX(max_r, ref[j]);
553 min_x = FFMIN(min_x, mv_predictor[j][0]);
554 min_y = FFMIN(min_y, mv_predictor[j][1]);
555 min_r = FFMIN(min_r, ref[j]);
557 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
558 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
559 ref[pred_count + 1] = sum_r - max_r - min_r;
561 if (pred_count == 4) {
562 mv_predictor[pred_count + 1][0] /= 2;
563 mv_predictor[pred_count + 1][1] /= 2;
564 ref[pred_count + 1] /= 2;
569 skip_mean_and_median:
573 if (!fixed[mb_xy] && 0) {
574 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
577 ff_thread_await_progress(&s->last_pic->tf,
580 if (!s->last_pic->motion_val[0] ||
581 !s->last_pic->ref_index[0])
583 prev_x = s->last_pic->motion_val[0][mot_index][0];
584 prev_y = s->last_pic->motion_val[0][mot_index][1];
585 prev_ref = s->last_pic->ref_index[0][4 * mb_xy];
587 prev_x = s->cur_pic->motion_val[0][mot_index][0];
588 prev_y = s->cur_pic->motion_val[0][mot_index][1];
589 prev_ref = s->cur_pic->ref_index[0][4 * mb_xy];
593 mv_predictor[pred_count][0] = prev_x;
594 mv_predictor[pred_count][1] = prev_y;
595 ref[pred_count] = prev_ref;
600 for (j = 0; j < pred_count; j++) {
601 int *linesize = s->cur_pic->f.linesize;
603 uint8_t *src = s->cur_pic->f.data[0] +
604 mb_x * 16 + mb_y * 16 * linesize[0];
606 s->cur_pic->motion_val[0][mot_index][0] =
607 s->mv[0][0][0] = mv_predictor[j][0];
608 s->cur_pic->motion_val[0][mot_index][1] =
609 s->mv[0][0][1] = mv_predictor[j][1];
611 // predictor intra or otherwise not available
615 s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
616 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
618 if (mb_x > 0 && fixed[mb_xy - 1]) {
620 for (k = 0; k < 16; k++)
621 score += FFABS(src[k * linesize[0] - 1] -
622 src[k * linesize[0]]);
624 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
626 for (k = 0; k < 16; k++)
627 score += FFABS(src[k * linesize[0] + 15] -
628 src[k * linesize[0] + 16]);
630 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
632 for (k = 0; k < 16; k++)
633 score += FFABS(src[k - linesize[0]] - src[k]);
635 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
637 for (k = 0; k < 16; k++)
638 score += FFABS(src[k + linesize[0] * 15] -
639 src[k + linesize[0] * 16]);
642 if (score <= best_score) { // <= will favor the last MV
647 score_sum += best_score;
648 s->mv[0][0][0] = mv_predictor[best_pred][0];
649 s->mv[0][0][1] = mv_predictor[best_pred][1];
651 for (i = 0; i < mot_step; i++)
652 for (j = 0; j < mot_step; j++) {
653 s->cur_pic->motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
654 s->cur_pic->motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
657 s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
658 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
661 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
662 fixed[mb_xy] = MV_CHANGED;
665 fixed[mb_xy] = MV_UNCHANGED;
673 for (i = 0; i < s->mb_num; i++) {
674 int mb_xy = s->mb_index2xy[i];
676 fixed[mb_xy] = MV_FROZEN;
681 static int is_intra_more_likely(ERContext *s)
683 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
685 if (!s->last_pic || !s->last_pic->f.data[0])
686 return 1; // no previous frame available -> use spatial prediction
689 for (i = 0; i < s->mb_num; i++) {
690 const int mb_xy = s->mb_index2xy[i];
691 const int error = s->error_status_table[mb_xy];
692 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
696 if (s->avctx->codec_id == AV_CODEC_ID_H264 && s->ref_count <= 0)
699 if (undamaged_count < 5)
700 return 0; // almost all MBs damaged -> use temporal prediction
702 // prevent dsp.sad() check, that requires access to the image
704 s->avctx->hwaccel && s->avctx->hwaccel->decode_mb &&
705 s->cur_pic->f.pict_type == AV_PICTURE_TYPE_I)
708 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
712 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
713 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
715 const int mb_xy = mb_x + mb_y * s->mb_stride;
717 error = s->error_status_table[mb_xy];
718 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
719 continue; // skip damaged
722 // skip a few to speed things up
723 if ((j % skip_amount) != 0)
726 if (s->cur_pic->f.pict_type == AV_PICTURE_TYPE_I) {
727 int *linesize = s->cur_pic->f.linesize;
728 uint8_t *mb_ptr = s->cur_pic->f.data[0] +
729 mb_x * 16 + mb_y * 16 * linesize[0];
730 uint8_t *last_mb_ptr = s->last_pic->f.data[0] +
731 mb_x * 16 + mb_y * 16 * linesize[0];
733 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
736 ff_thread_await_progress(&s->last_pic->tf, mb_y, 0);
738 is_intra_likely += s->dsp->sad[0](NULL, last_mb_ptr, mb_ptr,
740 // FIXME need await_progress() here
741 is_intra_likely -= s->dsp->sad[0](NULL, last_mb_ptr,
742 last_mb_ptr + linesize[0] * 16,
745 if (IS_INTRA(s->cur_pic->mb_type[mb_xy]))
752 // av_log(NULL, AV_LOG_ERROR, "is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
753 return is_intra_likely > 0;
756 void ff_er_frame_start(ERContext *s)
758 if (!s->avctx->error_concealment)
761 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
762 s->mb_stride * s->mb_height * sizeof(uint8_t));
763 s->error_count = 3 * s->mb_num;
764 s->error_occurred = 0;
767 static int er_supported(ERContext *s)
769 if(s->avctx->hwaccel && s->avctx->hwaccel->decode_slice ||
770 s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
772 s->cur_pic->field_picture
780 * @param endx x component of the last macroblock, can be -1
781 * for the last of the previous line
782 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
783 * assumed that no earlier end or error of the same type occurred
785 void ff_er_add_slice(ERContext *s, int startx, int starty,
786 int endx, int endy, int status)
788 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
789 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
790 const int start_xy = s->mb_index2xy[start_i];
791 const int end_xy = s->mb_index2xy[end_i];
794 if (s->avctx->hwaccel && s->avctx->hwaccel->decode_slice)
797 if (start_i > end_i || start_xy > end_xy) {
798 av_log(s->avctx, AV_LOG_ERROR,
799 "internal error, slice end before start\n");
803 if (!s->avctx->error_concealment)
807 if (status & (ER_AC_ERROR | ER_AC_END)) {
808 mask &= ~(ER_AC_ERROR | ER_AC_END);
809 s->error_count -= end_i - start_i + 1;
811 if (status & (ER_DC_ERROR | ER_DC_END)) {
812 mask &= ~(ER_DC_ERROR | ER_DC_END);
813 s->error_count -= end_i - start_i + 1;
815 if (status & (ER_MV_ERROR | ER_MV_END)) {
816 mask &= ~(ER_MV_ERROR | ER_MV_END);
817 s->error_count -= end_i - start_i + 1;
820 if (status & ER_MB_ERROR) {
821 s->error_occurred = 1;
822 s->error_count = INT_MAX;
826 memset(&s->error_status_table[start_xy], 0,
827 (end_xy - start_xy) * sizeof(uint8_t));
830 for (i = start_xy; i < end_xy; i++)
831 s->error_status_table[i] &= mask;
834 if (end_i == s->mb_num)
835 s->error_count = INT_MAX;
837 s->error_status_table[end_xy] &= mask;
838 s->error_status_table[end_xy] |= status;
841 s->error_status_table[start_xy] |= VP_START;
843 if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
844 er_supported(s) && s->avctx->skip_top * s->mb_width < start_i) {
845 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
847 prev_status &= ~ VP_START;
848 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
849 s->error_occurred = 1;
850 s->error_count = INT_MAX;
855 void ff_er_frame_end(ERContext *s)
857 int *linesize = s->cur_pic->f.linesize;
858 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
860 int threshold_part[4] = { 100, 100, 100 };
863 int size = s->b8_stride * 2 * s->mb_height;
865 /* We do not support ER of field pictures yet,
866 * though it should not crash if enabled. */
867 if (!s->avctx->error_concealment || s->error_count == 0 ||
870 s->error_count == 3 * s->mb_width *
871 (s->avctx->skip_top + s->avctx->skip_bottom)) {
874 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
875 int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
880 if ( mb_x == s->mb_width
881 && s->avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO
882 && (s->avctx->height&16)
883 && s->error_count == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)
885 av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
890 if (s->last_pic->f.width != s->cur_pic->f.width ||
891 s->last_pic->f.height != s->cur_pic->f.height ||
892 s->last_pic->f.format != s->cur_pic->f.format) {
893 av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
898 if (s->next_pic->f.width != s->cur_pic->f.width ||
899 s->next_pic->f.height != s->cur_pic->f.height ||
900 s->next_pic->f.format != s->cur_pic->f.format) {
901 av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
906 if (s->cur_pic->motion_val[0] == NULL) {
907 av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
909 for (i = 0; i < 2; i++) {
910 s->cur_pic->ref_index_buf[i] = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
911 s->cur_pic->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
912 if (!s->cur_pic->ref_index_buf[i] || !s->cur_pic->motion_val_buf[i])
914 s->cur_pic->ref_index[i] = s->cur_pic->ref_index_buf[i]->data;
915 s->cur_pic->motion_val[i] = (int16_t (*)[2])s->cur_pic->motion_val_buf[i]->data + 4;
918 for (i = 0; i < 2; i++) {
919 av_buffer_unref(&s->cur_pic->ref_index_buf[i]);
920 av_buffer_unref(&s->cur_pic->motion_val_buf[i]);
921 s->cur_pic->ref_index[i] = NULL;
922 s->cur_pic->motion_val[i] = NULL;
928 if (s->avctx->debug & FF_DEBUG_ER) {
929 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
930 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
931 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
933 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
935 av_log(s->avctx, AV_LOG_DEBUG, "\n");
940 /* handle overlapping slices */
941 for (error_type = 1; error_type <= 3; error_type++) {
944 for (i = s->mb_num - 1; i >= 0; i--) {
945 const int mb_xy = s->mb_index2xy[i];
946 int error = s->error_status_table[mb_xy];
948 if (error & (1 << error_type))
950 if (error & (8 << error_type))
954 s->error_status_table[mb_xy] |= 1 << error_type;
956 if (error & VP_START)
962 /* handle slices with partitions of different length */
963 if (s->partitioned_frame) {
966 for (i = s->mb_num - 1; i >= 0; i--) {
967 const int mb_xy = s->mb_index2xy[i];
968 int error = s->error_status_table[mb_xy];
970 if (error & ER_AC_END)
972 if ((error & ER_MV_END) ||
973 (error & ER_DC_END) ||
974 (error & ER_AC_ERROR))
978 s->error_status_table[mb_xy]|= ER_AC_ERROR;
980 if (error & VP_START)
985 /* handle missing slices */
986 if (s->avctx->err_recognition & AV_EF_EXPLODE) {
990 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
991 const int mb_xy = s->mb_index2xy[i];
992 int error1 = s->error_status_table[mb_xy];
993 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
995 if (error1 & VP_START)
998 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
999 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1000 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1001 (error1 & ER_MV_END))) {
1007 s->error_status_table[mb_xy] |= ER_MB_ERROR;
1012 /* backward mark errors */
1014 for (error_type = 1; error_type <= 3; error_type++) {
1015 for (i = s->mb_num - 1; i >= 0; i--) {
1016 const int mb_xy = s->mb_index2xy[i];
1017 int error = s->error_status_table[mb_xy];
1019 if (!s->mbskip_table[mb_xy]) // FIXME partition specific
1021 if (error & (1 << error_type))
1024 if (s->partitioned_frame) {
1025 if (distance < threshold_part[error_type - 1])
1026 s->error_status_table[mb_xy] |= 1 << error_type;
1028 if (distance < threshold)
1029 s->error_status_table[mb_xy] |= 1 << error_type;
1032 if (error & VP_START)
1038 /* forward mark errors */
1040 for (i = 0; i < s->mb_num; i++) {
1041 const int mb_xy = s->mb_index2xy[i];
1042 int old_error = s->error_status_table[mb_xy];
1044 if (old_error & VP_START) {
1045 error = old_error & ER_MB_ERROR;
1047 error |= old_error & ER_MB_ERROR;
1048 s->error_status_table[mb_xy] |= error;
1052 /* handle not partitioned case */
1053 if (!s->partitioned_frame) {
1054 for (i = 0; i < s->mb_num; i++) {
1055 const int mb_xy = s->mb_index2xy[i];
1056 error = s->error_status_table[mb_xy];
1057 if (error & ER_MB_ERROR)
1058 error |= ER_MB_ERROR;
1059 s->error_status_table[mb_xy] = error;
1064 dc_error = ac_error = mv_error = 0;
1065 for (i = 0; i < s->mb_num; i++) {
1066 const int mb_xy = s->mb_index2xy[i];
1067 error = s->error_status_table[mb_xy];
1068 if (error & ER_DC_ERROR)
1070 if (error & ER_AC_ERROR)
1072 if (error & ER_MV_ERROR)
1075 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1076 dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic->f.pict_type));
1078 is_intra_likely = is_intra_more_likely(s);
1080 /* set unknown mb-type to most likely */
1081 for (i = 0; i < s->mb_num; i++) {
1082 const int mb_xy = s->mb_index2xy[i];
1083 error = s->error_status_table[mb_xy];
1084 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1087 if (is_intra_likely)
1088 s->cur_pic->mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1090 s->cur_pic->mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1093 // change inter to intra blocks if no reference frames are available
1094 if (!(s->last_pic && s->last_pic->f.data[0]) &&
1095 !(s->next_pic && s->next_pic->f.data[0]))
1096 for (i = 0; i < s->mb_num; i++) {
1097 const int mb_xy = s->mb_index2xy[i];
1098 if (!IS_INTRA(s->cur_pic->mb_type[mb_xy]))
1099 s->cur_pic->mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1102 /* handle inter blocks with damaged AC */
1103 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1104 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1105 const int mb_xy = mb_x + mb_y * s->mb_stride;
1106 const int mb_type = s->cur_pic->mb_type[mb_xy];
1107 const int dir = !(s->last_pic && s->last_pic->f.data[0]);
1108 const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1111 error = s->error_status_table[mb_xy];
1113 if (IS_INTRA(mb_type))
1115 if (error & ER_MV_ERROR)
1116 continue; // inter with damaged MV
1117 if (!(error & ER_AC_ERROR))
1118 continue; // undamaged inter
1120 if (IS_8X8(mb_type)) {
1121 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1123 mv_type = MV_TYPE_8X8;
1124 for (j = 0; j < 4; j++) {
1125 s->mv[0][j][0] = s->cur_pic->motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1126 s->mv[0][j][1] = s->cur_pic->motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1129 mv_type = MV_TYPE_16X16;
1130 s->mv[0][0][0] = s->cur_pic->motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1131 s->mv[0][0][1] = s->cur_pic->motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1134 s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
1135 mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1140 if (s->cur_pic->f.pict_type == AV_PICTURE_TYPE_B) {
1141 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1142 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1143 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1144 const int mb_xy = mb_x + mb_y * s->mb_stride;
1145 const int mb_type = s->cur_pic->mb_type[mb_xy];
1146 int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1148 error = s->error_status_table[mb_xy];
1150 if (IS_INTRA(mb_type))
1152 if (!(error & ER_MV_ERROR))
1153 continue; // inter with undamaged MV
1154 if (!(error & ER_AC_ERROR))
1155 continue; // undamaged inter
1157 if (!(s->last_pic && s->last_pic->f.data[0]))
1158 mv_dir &= ~MV_DIR_FORWARD;
1159 if (!(s->next_pic && s->next_pic->f.data[0]))
1160 mv_dir &= ~MV_DIR_BACKWARD;
1163 int time_pp = s->pp_time;
1164 int time_pb = s->pb_time;
1166 av_assert0(s->avctx->codec_id != AV_CODEC_ID_H264);
1167 ff_thread_await_progress(&s->next_pic->tf, mb_y, 0);
1169 s->mv[0][0][0] = s->next_pic->motion_val[0][xy][0] * time_pb / time_pp;
1170 s->mv[0][0][1] = s->next_pic->motion_val[0][xy][1] * time_pb / time_pp;
1171 s->mv[1][0][0] = s->next_pic->motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1172 s->mv[1][0][1] = s->next_pic->motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1180 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1187 /* the filters below manipulate raw image, skip them */
1188 if (CONFIG_XVMC && s->avctx->hwaccel && s->avctx->hwaccel->decode_mb)
1190 /* fill DC for inter blocks */
1191 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1192 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1193 int dc, dcu, dcv, y, n;
1195 uint8_t *dest_y, *dest_cb, *dest_cr;
1196 const int mb_xy = mb_x + mb_y * s->mb_stride;
1197 const int mb_type = s->cur_pic->mb_type[mb_xy];
1199 error = s->error_status_table[mb_xy];
1201 if (IS_INTRA(mb_type) && s->partitioned_frame)
1203 // if (error & ER_MV_ERROR)
1204 // continue; // inter data damaged FIXME is this good?
1206 dest_y = s->cur_pic->f.data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1207 dest_cb = s->cur_pic->f.data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1208 dest_cr = s->cur_pic->f.data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1210 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1211 for (n = 0; n < 4; n++) {
1213 for (y = 0; y < 8; y++) {
1215 for (x = 0; x < 8; x++)
1216 dc += dest_y[x + (n & 1) * 8 +
1217 (y + (n >> 1) * 8) * linesize[0]];
1219 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1223 for (y = 0; y < 8; y++) {
1225 for (x = 0; x < 8; x++) {
1226 dcu += dest_cb[x + y * linesize[1]];
1227 dcv += dest_cr[x + y * linesize[2]];
1230 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1231 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1235 /* guess DC for damaged blocks */
1236 guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1237 guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1238 guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1241 /* filter luma DC */
1242 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1245 /* render DC only intra */
1246 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1247 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1248 uint8_t *dest_y, *dest_cb, *dest_cr;
1249 const int mb_xy = mb_x + mb_y * s->mb_stride;
1250 const int mb_type = s->cur_pic->mb_type[mb_xy];
1252 error = s->error_status_table[mb_xy];
1254 if (IS_INTER(mb_type))
1256 if (!(error & ER_AC_ERROR))
1257 continue; // undamaged
1259 dest_y = s->cur_pic->f.data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1260 dest_cb = s->cur_pic->f.data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1261 dest_cr = s->cur_pic->f.data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1263 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1268 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1269 /* filter horizontal block boundaries */
1270 h_block_filter(s, s->cur_pic->f.data[0], s->mb_width * 2,
1271 s->mb_height * 2, linesize[0], 1);
1272 h_block_filter(s, s->cur_pic->f.data[1], s->mb_width,
1273 s->mb_height, linesize[1], 0);
1274 h_block_filter(s, s->cur_pic->f.data[2], s->mb_width,
1275 s->mb_height, linesize[2], 0);
1277 /* filter vertical block boundaries */
1278 v_block_filter(s, s->cur_pic->f.data[0], s->mb_width * 2,
1279 s->mb_height * 2, linesize[0], 1);
1280 v_block_filter(s, s->cur_pic->f.data[1], s->mb_width,
1281 s->mb_height, linesize[1], 0);
1282 v_block_filter(s, s->cur_pic->f.data[2], s->mb_width,
1283 s->mb_height, linesize[2], 0);
1287 /* clean a few tables */
1288 for (i = 0; i < s->mb_num; i++) {
1289 const int mb_xy = s->mb_index2xy[i];
1290 int error = s->error_status_table[mb_xy];
1292 if (s->cur_pic->f.pict_type != AV_PICTURE_TYPE_B &&
1293 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1294 s->mbskip_table[mb_xy] = 0;
1296 s->mbintra_table[mb_xy] = 1;